Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$742,158$466 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $230,000 on Jul 14, 1999

270 CORNWELL AVE

VALLEY STREAM, NY 11580
1
Baths
1,592 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1927
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$742K
$714K low$771K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$230,000 · Jul 14, 1999
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$742,158
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$593,726

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,881 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$431 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$187
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$244
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$442
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$431,000

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.24 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.52%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.0.2 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyNASSAU
Lot (acres)The size of the land the home sits on, from county records.0.14
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 168 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Valley Stream Central High SchoolA-
High · Grades 10–12 · 0.8 mi
M
Valley Stream Memorial Junior High SchoolC+
Middle · Grades 7–9 · 0.9 mi

District: Valley Stream Central High School District

Neighborhood · ZIP 11580These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.63
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.94

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.43,040
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.11,017 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,895
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,272
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

270 Cornwell Ave measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 68% of homes in Nassau County
  • Costs less per square foot than 71% of homes in Valley Stream 11580
  • Bigger than 67% of homes in Valley Stream 11580
  • Has a smaller lot than 70% of homes in Nassau County
  • Older than 88% of homes in Valley Stream 11580

What homes are worth in Valley Stream 11580

Each bar is how many homes fall in that price range. The marker is this home.

This home
$492K$1.1M

This home is worth more than 59% of homes in Valley Stream 11580.

How it measures up in Valley Stream 11580

The dot is this home. The mark in the middle is the typical home in Valley Stream 11580.

Estimated value$742,158
CheaperTypical $717,511Pricier

Pricier than 59% of homes nearby

Price per ft²$466
CheaperTypical $508Pricier

Pricier than 29% of homes nearby

Living area1,592 ft²
SmallerTypical 1,406 ft²Bigger

Bigger than 67% of homes nearby

Lot size0.14 ac
SmallerTypical 0.12 acBigger

Bigger than 59% of homes nearby

Year built1927
OlderTypical 1949Newer

Newer than 12% of homes nearby

How 270 Cornwell Ave ranks against every home in each area.
MeasureThis homeValley Stream 11580Nassau County
Estimated valuepricier than$742,15859% of homes32% of homes
Price per ft²pricier than$46629% of homes31% of homes
Living areabigger than1,592 ft²67% of homes41% of homes
Lot sizebigger than0.14 ac59% of homes30% of homes
Year builtnewer than192712% of homes12% of homes

About 270 Cornwell Ave

How much is 270 Cornwell Ave, Valley Stream, NY worth?

The TopHap Estimate for 270 Cornwell Ave, Valley Stream, NY is $742,158 as of Jul 14, 2026. The likely range is $713,592 to $770,724. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 270 Cornwell Ave, Valley Stream, NY last sell?

270 Cornwell Ave, Valley Stream, NY last sold on Jul 14, 1999 for $230,000, according to the county's recorded deed.

How big is 270 Cornwell Ave, Valley Stream, NY?

270 Cornwell Ave, Valley Stream, NY has 1 bathrooms, 1,592 square feet of living space and a 0.14-acre lot.

When was 270 Cornwell Ave, Valley Stream, NY built?

270 Cornwell Ave, Valley Stream, NY was built in 1927, making it 99 years old. The building has 2 stories.

What schools serve 270 Cornwell Ave, Valley Stream, NY?

270 Cornwell Ave, Valley Stream, NY is assigned to Valley Stream Central High School (high), rated A-; Valley Stream Memorial Junior High School (middle), rated C+. All sit in Valley Stream Central High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 270 Cornwell Ave, Valley Stream, NY compare to other homes in Valley Stream 11580?

Among the 10,974 homes in Valley Stream 11580, it is worth more than 59% of them ($742,158 against a typical $717,511), its price per square foot is higher than 29% of them ($466 against a typical $508), it is bigger than 67% of them (1,592 ft² against a typical 1,406 ft²), its lot is bigger than 59% of them (0.14 ac against a typical 0.12 ac) and it is newer than 12% of them (1927 against a typical 1949). Measured against all of Nassau County, it is worth more than 32% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 270 Cornwell Ave, Valley Stream, NY?

The 2025 property tax bill for 270 Cornwell Ave, Valley Stream, NY was $7,881. The county assessed it at $431.

More homes on Cornwell Ave

Closest homes

More homes in Valley Stream 11580

Assigned schools

Explore the area

See this home in context

Open 270 Cornwell Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map